Less overtime this year? How lenders read a lower T4

Overtime on a frontline schedule is not a straight line. A staffing crunch fills every shift one year, new hires arrive the next, and the extra pay falls away. A move to a day line, a leave, or a promotion into a role with less callback can do the same thing. When you sit down to apply for a mortgage, the two T4s on the table no longer tell the same story, and that is the question this guide answers.

Does a drop in overtime hurt my mortgage application?

It reduces the extra income a lender is willing to count. It does not reduce your base salary. Your rank, class or step on the salary schedule is fixed by your collective agreement and proven by an employment letter and a recent stub, so that part of the file is untouched.

The Office of the Superintendent of Financial Institutions, which sets underwriting expectations for federally regulated lenders, says income assessments should reflect the stability of the borrower's income. It also says temporarily high income, with overtime named as an example, should be suitably normalised or discounted. A falling pattern is exactly the case where a lender asks whether the higher year was temporary.

Will a lender still use the two-year average?

Sometimes, and sometimes not. A two-year average is the common starting point for variable pay, as our guide to paid duty, overtime and shift premium explains. When the two years are close or rising, the average is usually where the conversation ends. When the more recent year is clearly lower, lenders differ: some will still average, some will use the lower year, and some will leave the overtime out and qualify you on base pay alone.

None of those approaches is wrong. They reflect different policies, which is why a file with falling overtime is one where the choice of lender does real work.

Why the reason for the drop matters

A lender is trying to decide which year looks like your future. The explanation, in writing, is what lets them decide. Some reasons point clearly one way:

A leave of absence during the lower year. The overtime fell because you were not working, and a return-to-work date restores the pattern.
A temporary assignment or secondment with no overtime eligibility, ending on a known date.
A move to a different line or role where overtime is less available. That points to the lower year being the new normal.
A service-wide change in staffing or scheduling. That also suggests the lower year is more representative.

Be honest about which group you fall into. A file built on overtime you do not expect to work again creates a payment you may struggle to carry.

Does the current year help or hurt?

Your most recent pay stub shows year-to-date earnings, and a lender will compare that pace with the T4s. If overtime has picked up again this year, the stub is evidence that the dip was temporary. If it has kept falling, the stub confirms the lower figure. Either way, bring the stub. A file that hides the current year usually gets asked for it anyway, later and at a worse moment.

Should I apply now or wait?

Start by testing the file on base pay alone. If base pay supports the purchase you have in mind, the overtime question becomes a cushion rather than a requirement, and timing matters much less. If the purchase only works with the higher overtime year counted, that is a sign to adjust the price range or to wait until you have a stronger, documented pattern.

A step increase can offset some of the loss. If you move up the salary schedule during the file, the higher base rate is usable once it is confirmed in writing, and base pay is counted in full rather than averaged.

What should I bring to show the full picture?

Two years of T4 slips and the matching Notices of Assessment.
Your most recent consecutive pay stubs with year-to-date figures.
An employment letter that states your position, status and base salary, and confirms overtime is available in your role if that is true.
A short written explanation of the drop, with dates, for example a leave or an assignment.
The overtime article of your collective agreement, so the entitlement and rate are on the record.

What to do this week

Pull your last two T4s and write down the overtime in each year next to your base salary.
Check your latest stub for year-to-date overtime and compare the pace.
Write two or three sentences explaining why the overtime changed and whether you expect it back.
Work out what price range fits on base pay alone, using the mortgage tools on this site.
Book a review so the file goes to a lender whose policy fits your pattern.

Quick answers

Is my base salary affected when overtime drops? No. Base salary comes from your salary schedule and is counted in full.

Will a lender use my best overtime year? Not usually. Regulators expect overtime to be normalised or discounted, so the best year is rarely the figure used.

Does a leave explain lower overtime? It can. A documented leave with a return date tells the lender why the lower year is not the full story.

Can I qualify without any overtime? Yes, if your base pay supports the payment at the qualifying rate. Test the file on base pay first and treat overtime as extra room.

Lender treatment of overtime varies and changes over time. Nothing here is a promise that a lender will count a particular amount of overtime on your file. Any approval remains subject to the lender's assessment of the full application.